Changes to a DC’s attributes or structure can break the instance update in the option dialog, Using Name or changing the attribute dialog header can do this too,
If you want to have the instances to update in the option field you need to delete the spoilt instances in your example and drag them in from component home tab and add a instance name.
I scale definition of the “Objects_c1m” instance, so to keep its current size before deleting and reinserting it
SB - 2018 Model fix.skp (1.3 MB)
Its a matter of understanding the definition, instances and the repercussions of changing the attributes of an instance